Im looking for something like tag.exe, but i found that tag.exe has some bugs or limitations.What i want to do is to copy the tags from one file (lets say an mp3) to a file in another format (acc, ogg, etc).Also want to be able to read and write the tags.

If an automated GUI solution is a possibility, consider this the inevitable mention of foobar2000; it can copy metadata fields between two sets of files, provided they are arranged in equivalent order in two playlists.

Good to know. Unfortunately I canít be of much help in that case. This question (both the general idea and the desire for something better than tag.exe) comes up quite frequently, but I donít recall there being any program that decisively answers it. Hopefully thatís just my memory failing me!

I don't know in what language you are planning to write your manager, but a google search will probably give you some results on tagging libraries for popular languages. For example you could use mutagen (Python 2.3+) to read and write tags using Python. I didn't test it so far, but the library looks clean and easy to use, and you could set up your own Python command line tool in short time (if you know some Python).

Long ago I did make a VBScript for this type usage (I had also feature which constructed music library based on tag information (create folders by artist/album etc.). I couldn't find those scripts I made anymore but, still located the sources I got ideas from to start.